The New York Post reports that Hilaria will become Mrs. Baldwin on June 30 at the Basilica of St. Patrick’s Old Cathedral in downtown New York City. The cathedral was used as a location in The Godfather, Mean Streets and Gangs of New York.

The source added that Alec and Hilaria spent a long time deciding on a venue, and it "wasn't a quick decision."

Despite the 25-year age difference, the 30 Rock star and yoga instructor have had a whirlwind romance since meeting in early 2011.

"All of a sudden I found myself where I was available to have something more real in my life," Alec told The Daily Beast this past summer. "And now I’m going to move in with her. It’s the most serious thing, I guess, I’ve had in a long, long time."

Alec and ex-wife Kim Basinger divorced after eight years together in 2001. This is the first marriage for Hilaria.